Unfortunately though, according to Twitter, 250,000 user’s email addresses, session tokens and encrypted versions of passwords, have all been compromised. Twitter has reset the passwords and revoked session tokens from all accounts that have been affected by this security breach.

This means that if you’re part of this group of 250,000, when you try to log into Twitter today, your password won’t work. Twitter is also encouraging all users to reset their passwords.

“Though only a very small percentage of our users were potentially affected by this attack, we encourage all users to take this opportunity to ensure that they are following good password hygiene, on Twitter and elsewhere on the Internet,” said Twitter in a statement on their website.

Twitter believes that this attack was not the work of amateur hackers and that it was not an isolated incident. They describe the attack as “sophisticated” and explained that they believe other companies and organizations have also recently been attacked in the exact same way.

Even if you weren’t affected by this attack, it seems like it might be time to update your Twitter password.